return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: M06-2X/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at M06-2X/6-31G**
 hartrees
Energy at 0K-132.695821
Energy at 298.15K-132.698439
HF Energy-132.695821
Nuclear repulsion energy58.446834
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at M06-2X/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3100 2946 1.41 137.89 0.00 0.00
2 A1 2450 2328 8.56 46.24 0.30 0.46
3 A1 1419 1348 3.25 10.42 0.65 0.79
4 A1 950 903 2.63 3.93 0.21 0.34
5 E 3187 3029 0.41 69.12 0.75 0.86
5 E 3187 3029 0.41 69.08 0.75 0.86
6 E 1488 1415 10.70 17.30 0.75 0.86
6 E 1488 1415 10.71 17.27 0.75 0.86
7 E 1064 1012 3.21 0.09 0.75 0.86
7 E 1064 1011 3.18 0.09 0.75 0.86
8 E 392 373 0.47 4.22 0.75 0.86
8 E 392 373 0.48 4.16 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10090.7 cm-1
Scaled (by 0.9504) Zero Point Vibrational Energy (zpe) 9590.2 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at M06-2X/6-31G**
ABC
5.29866 0.30703 0.30703

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.180
C2 0.000 0.000 0.281
N3 0.000 0.000 1.436
H4 0.000 1.026 -1.552
H5 0.888 -0.513 -1.552
H6 -0.888 -0.513 -1.552

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46172.61661.09111.09111.0911
C21.46171.15492.10092.10092.1009
N32.61661.15493.15953.15953.1595
H41.09112.10093.15951.77671.7767
H51.09112.10093.15951.77671.7767
H61.09112.10093.15951.77671.7767

picture of Acetonitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 180.000 C2 C1 H4 109.921
C2 C1 H5 109.921 C2 C1 H6 109.921
H4 C1 H5 109.018 H4 C1 H6 109.018
H5 C1 H6 109.018
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.419      
2 C 0.308      
3 N -0.453      
4 H 0.188      
5 H 0.188      
6 H 0.188      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -3.827 3.827
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.308 0.000 0.000
y 0.000 -17.308 0.000
z 0.000 0.000 -20.260
Traceless
 xyz
x 1.476 0.000 0.000
y 0.000 1.476 0.000
z 0.000 0.000 -2.952
Polar
3z2-r2-5.904
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.618 0.000 0.000
y 0.000 2.622 -0.002
z 0.000 -0.002 5.031


<r2> (average value of r2) Å2
<r2> 45.082
(<r2>)1/2 6.714